Playfair cipher decoder essay

Playfair cipher decoder essay

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Playfair cipher decoder essay Essay


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f area code towards Encrypt Sales message making use of PlayFair (Monarchy) Cipher

h routine playfair cipher decoder essay use PlayFair Cipher in order to encrypt a new given message.

#include<stdio.h>#include<conio.h>voidmain() { char v,w,ch,string[100],arr[5][5],key[10],a,b,enc[100]; int temp,i,j,k,l,r1,r2,c1,c2,t,var; FILE* fp; fp=fopen("sk.txt","r"); //keep sales message playfair cipher decoder essay sk.txt playfair cipher decoder essay. jamia) clrscr(); printf("Enter any key\n"); fflush(stdin); scanf("%s",&key); bach death essay while(1) { ch=fgetc(fp); if(ch!=EOF) { string[l++]=ch; } frog beanie child importance essay break; } string[l]='\0'; puts(string); for(i=0;key[i]!='\0';i++) { for(j=i+1;key[j]!='\0';j++) { if(key[i]==key[j]) { temp=1; break; } } } if(temp==1) printf("invalid key"); as well { k=0; a='a'; //printf("%c",b);for(i=0;i<5;i++) { for(j=0;j<5;j++) { if(k<strlen(key)) arr[i][j]=key[k]; elseif(k==strlen(key)) { b:for(l=0;l<strlen(key);l++) { if(key[l]==a) { a++; goto b; } } arr[i][j]=a; if(a=='i') a=a+2; as well a++; } if(k<strlen(key)) k++; } } printf("\n"); printf("The matrix is\n"); for(i=0;i<5;i++) { mazda created in exactly what state essay { printf("%c",arr[i][j]); } printf("\n"); } t=0; if(strlen(string)%2!=0) var=strlen(string)-1; for(i=0;i<var;) { v=string[i++]; w=string[i++]; if(v==w) { enc[t++]=v; enc[t++]='$'; } altogether different { for(l=0;l<5;l++) { for(k=0;k<5;k++) { if(arr[l][k]==v||v=='j'&&arr[l][k]=='i') { r1=l; c1=k; } if(arr[l][k]==w||w=='j'&&arr[l][k]=='i') { r2=l; c2=k; } } } if(c1==c2) { r1++; r2++; if(r1==5||r2==5) { r1=0; r2=0; } } elseif(r1==r2) { c1++; c2++; if(c1==5||c2==5) { c1=0; c2=0; } } as well { temp=r1; r1=r2; r2=temp; } enc[t++]=arr[r1][c1]; enc[t++]=arr[r2][c2]; } } if(strlen(string)%2!=0) enc[t++]=string[var]; enc[t]='\0'; } printf("The encrypted playfair cipher decoder essay is\n"); puts(enc); getch(); }

Output in typically the above program:-

Result of PlayFair (Monarchy) Cipher 

Related Programs:-

★ RSA Algorithm

★ Encrypt and even Decrypt an important principles working with Substitution Cipher

★ Encrypt along with Decrypt some meaning working with Vernan Cipher

★ Encrypt plus Decrypt an important sales message using Transposition Cipher

★ Evaluate compression setting ratio


PlayFair Cipher

Playfair cipher

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